JLG X23J - X700AJ Service Manual - Manual (Page 307)

SECTION 3 - CHASSIS & TURNTABLE
3-280 – JLG Lift – 3121448
– On version with oilbath air cleaner, remove screw „2“
and take off cover plate with noise-insulating hood.
– Remove any contamination adhering to the cover for the
cylinder head.
– Remove screws „1“and take off the cylinder head cover
with gasket „2“.
– Remove rubber cap from the inspection hole cover.
– Turn the engine over in the normal direction of rotation
until the valves are in the overlap position (exhaust valve
not yet closed, inlet valve starts to open).
– Turn the crankshaft through 360° in the normal direction
of rotation and align exactly to the OT-marking.
– Check valve clearances with feeler gauge „1“(0.10 mm).
– If valve clearances require adjusting, slacken off screw
„2“and turn hex nut „3“until feeler gauge „1“can be pulled
through with just slight resistance when screw „2“is
retightened.
– Fit cover for cylinder head and tighten evenly, always
using a new gasket.
– Re-attach parts previously removed from engine. Do not
forget: replace the rubber cap at the inspection hole
cover.
– Carry out a brief test run, then check the cover for leaks.
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